Abstract Blending different molecular weight polyacrylonitrile (PAN) was adopted to solve the shrinkage problem of high molecular weight PAN hollow fiber membrane, to enhance the application performance of low molecular weight PAN membrane, and to adjust the porosity, pore size distribution, and hydrophilicity of the end product. The structurally-optimized membrane was chosen as a substrate to support Fe/Mn oxides and then used as a reactor to remove dyes from their solutions in the presence of H2O2. The results showed that the flux of methylene blue (MB) aqueous solution was 83.7 L/m2 h for the PAN homogeneous blend membrane, much higher than 29.1 L/m2 h of high molecular weight PAN membrane; MB removal efficiency was 97.3%, higher than 62.3% of low molecular weight PAN membrane, and it could be reused 25 times to remove dyes from their solutions without any loss in removal efficiency. The membrane was also found to have the application advantages of decreasing H2O2 dosage, reducing operation pressure, and raising MB removal efficiency compared with other membranes reported in the pieces of literature. Therefore, we were confident that the hollow fiber membrane fabricated by us would exhibit great application potential in the field of decontaminating dye wastewater.

中文翻译：

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以结构稳定的聚丙烯腈均质共混中空纤维膜为基材负载Fe/Mn氧化物及其增强的染料废水净化能力

摘要 采用共混不同分子量聚丙烯腈（PAN）来解决高分子量 PAN 中空纤维膜的收缩问题，提高低分子量 PAN 膜的应用性能，调节膜的孔隙率、孔径分布和亲水性。最终产品。选择结构优化的膜作为载体来支持 Fe/Mn 氧化物，然后用作反应器在 H2O2 存在下从其溶液中去除染料。结果表明，PAN均质共混膜的亚甲蓝（MB）水溶液通量为83.7 L/m2 h，远高于高分子量PAN膜的29.1 L/m2 h；MB去除效率为97.3%，高于低分子量PAN膜的62.3%，它可以重复使用 25 次以去除溶液中的染料，而不会降低去除效率。与文献报道的其他膜相比，还发现该膜具有降低 H2O2 用量、降低操作压力和提高 MB 去除效率的应用优势。因此，我们有信心我们制造的中空纤维膜在染料废水净化领域具有巨大的应用潜力。